[PATCH] D101684: [WebAssembly] Add end-to-end codegen tests for wasm_simd128.h

[David Blaikie via Phabricator via llvm-commits]

dblaikie added a comment.

In D101684#2737868 <https://reviews.llvm.org/D101684#2737868>, @tlively wrote:

> In D101684#2737842 <https://reviews.llvm.org/D101684#2737842>, @penzn wrote:
>
>> I think there is another dimension to this aside from project composition - intrinsics have a tendency to "interact" with their surroundings, and it better to capture the IR rather than the end result. Even if we can verify that simple calls produce instructions we expect, this might not hold true is the arguments change, or the call is in a different context. IR definitely gives more opportunities to test things through.
>
> Yeah, the contract that specific instructions are generated really only holds in trivial cases by design. I'm not sure how to best formalize that, though.

I don't know that much about intrinsics, but happy to help with test suggestions - do you have any practical examples of this you could show & I can see if I've got any ideas of good ways to test them?


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